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Low temperature Fischer-tropsch synthetic oil hydrofining and / or hydrogenation heterogeneous cracking system and technology

A technology for hydroisomerization cracking and Fischer-Tropsch synthetic oil, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, and can solve the problems of high device investment and operation cost, large bed temperature gradient and Complex process and other problems, to achieve the effect of long operation period, prolong operation period, reduce device investment and operation cost

Active Publication Date: 2015-03-25
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this literature, the method of combining multi-stage separation is adopted for product separation, and the separation process is complicated.
In addition, from the process flow chart (attached figure 1 ) It can be seen that the fixed-bed hydrofining reactor 8 uses the feeding method of upper feed, therefore, it is difficult to avoid the above-mentioned bed temperature gradient and pressure drop are large, the upper part of the reactor is easy to coke, and hydrogen needs to be circulated. Equipped with circulating hydrogen compressor, the problem of high equipment investment and operation cost

Method used

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  • Low temperature Fischer-tropsch synthetic oil hydrofining and / or hydrogenation heterogeneous cracking system and technology
  • Low temperature Fischer-tropsch synthetic oil hydrofining and / or hydrogenation heterogeneous cracking system and technology
  • Low temperature Fischer-tropsch synthetic oil hydrofining and / or hydrogenation heterogeneous cracking system and technology

Examples

Experimental program
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Effect test

Embodiment 1

[0067] use figure 1 The system shown performs hydrofinishing and hydroisomerization cracking of low temperature Fischer-Tropsch oil.

[0068] The low-temperature Fischer-Tropsch synthetic whole distillate oil from Shenhua coal-based syngas is used as raw material, and its properties are shown in Table 1. Liquid Phase Hydrofining Catalyst as NiO-MoO 3 -P 2 o 5 / Al 2 o 3 , purchased from Shandong Qilu Catalyst Factory, model is FF-26, wherein NiO is 3.5wt%, MoO 3 13.5wt%, P 2 o 5 1.4wt%, TiO 2 1.4%; slurry bed / ebullating bed hydroisomerization cracking catalyst is NiO-WO 3 / Al 2 o 3 , purchased from Shandong Qilu Catalyst Factory, model is FC-14, wherein NiO is 5wt%, WO 3 The specific properties of the catalyst are shown in Table 2. The operating conditions of fixed-bed liquid-phase hydrofinishing and slurry-bed / ebullating-bed hydroisomerization cracking are listed in Table 3, the properties of naphtha fraction, one of the products, are listed in Table 4, and the pr...

Embodiment 2

[0082] use figure 1 The system shown hydrofinishes cryogenic Fischer-Tropsch oil, i.e. shut down figure 1 The system shown is a slurry bed / ebullating bed hydroisomerization cracking unit.

[0083] With the raw material identical with embodiment 1, use the liquid phase hydrorefining catalyst identical with embodiment 1 and adopt the liquid phase hydrorefining unit identical with embodiment 1 and operating condition to carry out liquid phase hydrorefining, from product fractionation column Naphtha, diesel oil and wax oil (or tail oil) are obtained from the mixture, and their properties are shown in Table 6.

[0084] Table 6 Properties of Naphtha, Diesel Oil and Wax Oil After Hydrofinishing of Fischer-Tropsch Synthesis Whole Fraction Oil

[0085]

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Abstract

The invention relates to a low temperature Fischer-tropsch synthetic oil hydrofining and / or hydrogenation heterogeneous cracking system and a technology thereof. A hydrofining unit uses a liquid phase hydrogenation mode and a downward feeding mode, and thus the distribution of hydrogen concentration along the axial direction of a reactor is more reasonable. Besides, due to the fact that hydrogen consumed in a liquid phase hydrofining reaction process is from liquid phase saturated dissolved hydrogen, a circulating hydrogen compressor can be eliminated when the hydrofining unit is operated separately, and thus device investment and operating cost are reduced.

Description

technical field [0001] The present invention relates to a low-temperature Fischer-Tropsch synthetic oil processing system and process, more specifically, to a low-temperature Fischer-Tropsch synthetic oil hydrofinishing and / or hydroisomerization cracking system and process. Background technique [0002] The traditional low-temperature Fischer-Tropsch synthetic oil hydrofining process adopts fixed-bed reactors, and the feeding method is top-feeding. The temperature gradient and pressure drop of the bed layer are large, and the upper part of the reactor is prone to coking. In addition, hydrogen needs to be circulated, and a circulating hydrogen compressor needs to be configured, and the investment and operation costs of the device are relatively high. [0003] The C-C bond breaking reaction in the traditional hydroisomerization cracking unit can easily cause the temperature rise of the bed layer reaction. On the one hand, it is easy to cause a large number of secondary crackin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 石玉林金环年胡云剑李丽李景赵效洪马辉杜冰
Owner CHNA ENERGY INVESTMENT CORP LTD
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